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Flights to Ontario

$30 Cheap flights to Ontario

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ontario departing on 12/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from the United States to Ontario

Cheap round-trip flights

These are some of the best round-trip flight deals from the United States to Ontario that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from the United States to Ontario.

Cheap last minute flights

Planning a quick getaway from the United States to Ontario? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Ontario, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals to Ontario

Find recent round-trip train or bus tickets from the United States to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$56Frontier
Find Deal
Fri, Jan 24 - Sun, Jan 26
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$57Frontier
Find Deal
Fri, Jan 24 - Sun, Jan 26
2:05 pm - 4:54 pmSEA-ONT
2h 49mnonstop
5:50 am - 8:55 amONT-SEA
3h 05mnonstop
$137Delta
Find Deal
Wed, Dec 11 - Tue, Dec 17
8:25 am - 11:02 amSEA-ONT
2h 37mnonstop
6:00 am - 8:50 amONT-SEA
2h 50mnonstop
$147Alaska Airlines
Find Deal
Tue, Feb 18 - Wed, Feb 19
10:25 am - 12:58 pmSEA-ONT
2h 33mnonstop
6:00 am - 8:53 amONT-SEA
2h 53mnonstop
$157Alaska Airlines
Find Deal
Tue, Dec 10 - Sun, Dec 15
12:22 pm - 1:51 pmDFW-ONT
3h 29mnonstop
10:56 am - 3:54 pmONT-DFW
2h 58mnonstop
$169American Airlines
Find Deal
Sat, Jan 25 - Sat, Feb 1
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$178Delta
Find Deal
Thu, Jan 9 - Mon, Jan 13
8:25 am - 9:51 amSFO-ONT
1h 26mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$179United Airlines
Find Deal
Sat, Jan 11 - Sat, Jan 18
8:31 am - 9:56 amDFW-ONT
3h 25mnonstop
2:44 pm - 7:44 pmONT-DFW
3h 00mnonstop
$194American Airlines
Find Deal
Tue, Jan 7 - Tue, Jan 14
7:00 pm - 8:29 pmSFO-ONT
1h 29mnonstop
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
$199United Airlines
Find Deal
Fri, Jan 17 - Sat, Jan 18
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$30Frontier
Find Deal
Fri, Dec 6
10:29 pm - 11:59 pmDEN-ONT
2h 30mnonstop
$30Frontier
Find Deal
Tue, Dec 24
6:30 pm - 9:04 pmSEA-ONT
2h 34mnonstop
$67Alaska Airlines
Find Deal
Sat, Dec 14
6:30 pm - 9:04 pmSEA-ONT
2h 34mnonstop
$69Alaska Airlines
Find Deal
Sat, Dec 14
11:40 am - 6:24 pmSEA-ONT
6h 44m1 stop
$79American Airlines
Find Deal
Tue, Jan 21
4:35 pm - 6:04 pmSFO-ONT
1h 29mnonstop
$79United Airlines
Find Deal
Wed, Feb 5
11:17 am - 12:43 pmDEN-ONT
2h 26mnonstop
$79United Airlines
Find Deal
Sat, Jan 11
12:27 pm - 6:26 pmSFO-ONT
5h 59m1 stop
$99American Airlines
Find Deal
Tue, Feb 18
7:35 am - 10:25 amSEA-ONT
2h 50mnonstop
$114Delta
Find Deal
Wed, Dec 18
5:31 am - 11:50 amDFW-ONT
8h 19m1 stop
$118Delta
Find Deal
Wed, Feb 19
1:43 pm - 3:05 pmSFO-ONT
1h 22mnonstop
6:52 pm - 8:19 pmONT-SFO
1h 27mnonstop
$94Frontier
Find Deal
Sun, Nov 24 - Tue, Nov 26
1:43 pm - 3:05 pmSFO-ONT
1h 22mnonstop
4:07 pm - 5:33 pmONT-SFO
1h 26mnonstop
$97Frontier
Find Deal
Sun, Nov 24 - Mon, Nov 25
6:00 am - 12:03 pmLGA-ONT
9h 03m1 stop
7:15 am - 7:55 pmONT-LGA
9h 40m1 stop
$348American Airlines
Find Deal
Sat, Nov 23 - Sun, Nov 24
1:30 pm - 7:42 pmJFK-ONT
9h 12m1 stop
12:11 pm - 10:22 pmONT-JFK
7h 11m1 stop
$348Delta
Find Deal
Thu, Nov 21 - Wed, Dec 18
2:55 pm - 8:36 pmJFK-ONT
8h 41m1 stop
11:59 pm - 1:03 pmONT-JFK
10h 04m2 stops
$353American Airlines
Find Deal
Sat, Nov 23 - Sun, Nov 24
4:00 pm - 11:01 pmLGA-ONT
10h 01m1 stop
11:53 am - 11:42 pmONT-LGA
8h 49m1 stop
$358Delta
Find Deal
Fri, Nov 22 - Sun, Nov 24
4:35 pm - 10:23 pmSEA-ONT
5h 48m1 stop
1:55 pm - 9:07 pmONT-SEA
7h 12m1 stop
$391United Airlines
Find Deal
Fri, Nov 22 - Mon, Nov 25
4:30 pm - 10:23 pmEWR-ONT
8h 53m1 stop
5:05 am - 5:30 pmONT-EWR
9h 25m1 stop
$403United Airlines
Find Deal
Mon, Nov 25 - Wed, Dec 11
7:00 am - 5:35 pmJFK-ONT
13h 35m1 stop
6:00 am - 10:59 pmONT-JFK
13h 59m1 stop
$469Alaska Airlines
Find Deal
Thu, Nov 21 - Tue, Nov 26
7:00 am - 3:41 pmORD-ONT
10h 41m1 stop
6:27 pm - 4:30 amONT-ORD
8h 03m1 stop
$512Alaska Airlines
Find Deal
Mon, Nov 25 - Mon, Nov 25
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$56Frontier
Find Deal
Fri, Jan 24 - Sun, Jan 26
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$57Frontier
Find Deal
Fri, Jan 24 - Sun, Jan 26
2:05 pm - 4:54 pmSEA-ONT
2h 49mnonstop
5:50 am - 8:55 amONT-SEA
3h 05mnonstop
$137Delta
Find Deal
Wed, Dec 11 - Tue, Dec 17
4:24 pm - 5:57 pmSFO-ONT
1h 33mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$139United Airlines
Find Deal
Mon, Jan 27 - Tue, Jan 28
8:25 am - 11:02 amSEA-ONT
2h 37mnonstop
6:00 am - 8:50 amONT-SEA
2h 50mnonstop
$147Alaska Airlines
Find Deal
Tue, Feb 18 - Wed, Feb 26
10:25 am - 12:58 pmSEA-ONT
2h 33mnonstop
6:00 am - 8:53 amONT-SEA
2h 53mnonstop
$157Alaska Airlines
Find Deal
Tue, Dec 10 - Sun, Dec 15
12:22 pm - 1:51 pmDFW-ONT
3h 29mnonstop
10:56 am - 3:54 pmONT-DFW
2h 58mnonstop
$169American Airlines
Find Deal
Sat, Jan 25 - Sat, Feb 1
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$178Delta
Find Deal
Thu, Jan 9 - Mon, Jan 13
8:25 am - 9:51 amSFO-ONT
1h 26mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$179United Airlines
Find Deal
Sat, Jan 11 - Sat, Jan 18
8:31 am - 9:56 amDFW-ONT
3h 25mnonstop
2:44 pm - 7:44 pmONT-DFW
3h 00mnonstop
$194American Airlines
Find Deal
Tue, Jan 7 - Tue, Jan 14

See travel insights to Ontario from

Ontario flights insights and trends

Explore insights for your Ontario flight to craft the best travel plan

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from United States to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $255. If you aren’t able to travel during the month of January, then book flights to Ontario from United States during September instead. Flights to Ontario in September, while not as cheap as those in January, still average around $298.

What is the absolute cheapest flight to Ontario?

In the past two weeks, users have booked deals to Ontario for $47/person, which is 88% cheaper than the average flight to Ontario. To find the cheapest price to Ontario from your area, use momondo’s Airport-to-Airport Pricing Tool.
See prices from:

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $346. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from United States to Ontario for around $440.

What is the cheapest time of day to depart on your flight to Ontario?

At noon is the cheapest time of day to fly from United States to Ontario when you can find flight prices for as low as $317. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $402 on average. Flights to Ontario from United States in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Ontario?

Most flyers found that booking tickets 47 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around $370. However, in the past 72 hours, people saw flights from United States for as low as $249.

Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price

$30

Best Round-Trip Price

$56

Fastest flight time

1h 22m

Popular in

February
The best one-way flight price to Ontario from United States in the last 72 hours is $30 (San Francisco to Ontario).
The best round-trip flight price to Ontario from United States in the last 72 hours is $56 (San Francisco to Ontario).
The fastest flight to Ontario from United States takes 1h 22m (San Francisco to Ontario).
February has the highest demand for flights to Ontario, with a 17% price increase on average.

Frequently asked questions about flying to Ontario

Is there an alternative airport near Ontario?

Finding an alternative and possibly cheaper destination airport near Ontario is possible. If you are planning a flight to Ontario, consider booking flights to Ontario Airport (3 mi from Ontario city center), Santa Ana J. Wayne/Orange Cnty Airport (29 mi from Ontario city center), Long Beach Municipal Airport (33 mi from Ontario city center) or Burbank Bob Hope Airport (42 mi from Ontario city center).

Is there a cheaper alternative to flying into Ontario?

Prices vary based on where travelers are departing from, but on average, the cheapest airport to fly to in Ontario is Burbank Bob Hope Airport where the average price is $327. Users typically find the best prices when using momondo’s Airport-to-Airport Pricing Tool.

When did momondo last update prices for flights to Ontario Airport?

Prices for flights to Ontario Airport refresh daily.

How many operators does momondo search for flights to Ontario Airport?

How old do you have to be to fly to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.


Why use momondo?

Why should I use momondo to find a flight deal to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights to Ontario with flexible booking policies on momondo?

Yes. All flights to Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as filter your options to help you make an informed choice when booking flights to Ontario.

I’m not ready to book a flight to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert; this is where momondo will track prices on flights to Ontario and let you know when they change.


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Cheapest flight routes to Ontario

These routes have the cheapest flights to Ontario found by momondo users in United States
DepartingDestinationBest TimeBest Price
Las VegasOntario1h 00m$37
San FranciscoOntario1h 21m$55
DenverOntario2h 15m$57
Santa RosaOntario1h 26m$58
PortlandOntario2h 10m$77
SacramentoOntario1h 20m$80
Salt Lake CityOntario1h 47m$86
SeattleOntario2h 33m$94
DallasOntario3h 02m$106
AustinOntario3h 15m$108
PhoenixOntario1h 13m$108
ChicagoOntario4h 20m$118
San JoseOntario1h 15m$122
MinneapolisOntario5h 16m$123
HoustonOntario3h 19m$124
Los AngelesOntario9h 44m$128